* [PATCH v4 1/4] phy: phy-stih41x-usb: Add usb phy support for STiH41x SoCs.
2014-09-08 10:32 [PATCH v4 0/4] Add usb phy support for STiH41x SoCs Peter Griffin
@ 2014-09-08 10:33 ` Peter Griffin
2014-09-08 10:33 ` [PATCH v4 2/4] phy: phy-stih41x-usb: Add dt documentation for USB phy on STiH415/6 Peter Griffin
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Peter Griffin @ 2014-09-08 10:33 UTC (permalink / raw)
To: linux-arm-kernel, linux-kernel, kishon, srinivas.kandagatla,
maxime.coquelin, patrice.chotard
Cc: peter.griffin, lee.jones, devicetree
This driver adds support for USB (1.1 and 2.0) phy for STiH415 and
STiH416 System-On-Chips from STMicroelectronics.
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
drivers/phy/Kconfig | 8 ++
drivers/phy/Makefile | 1 +
drivers/phy/phy-stih41x-usb.c | 187 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 196 insertions(+)
create mode 100644 drivers/phy/phy-stih41x-usb.c
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 0dd7427..26f8a86 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -230,4 +230,12 @@ config PHY_XGENE
help
This option enables support for APM X-Gene SoC multi-purpose PHY.
+config PHY_STIH41X_USB
+ tristate "STMicroelectronics USB2 PHY driver for STiH41x series"
+ depends on ARCH_STI
+ select GENERIC_PHY
+ help
+ Enable this to support the USB transceiver that is part of
+ STMicroelectronics STiH41x SoC series.
+
endmenu
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 95c69ed..d02f365 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -28,3 +28,4 @@ obj-$(CONFIG_PHY_QCOM_IPQ806X_SATA) += phy-qcom-ipq806x-sata.o
obj-$(CONFIG_PHY_ST_SPEAR1310_MIPHY) += phy-spear1310-miphy.o
obj-$(CONFIG_PHY_ST_SPEAR1340_MIPHY) += phy-spear1340-miphy.o
obj-$(CONFIG_PHY_XGENE) += phy-xgene.o
+obj-$(CONFIG_PHY_STIH41X_USB) += phy-stih41x-usb.o
diff --git a/drivers/phy/phy-stih41x-usb.c b/drivers/phy/phy-stih41x-usb.c
new file mode 100644
index 0000000..9f16cb8
--- /dev/null
+++ b/drivers/phy/phy-stih41x-usb.c
@@ -0,0 +1,187 @@
+/*
+ * Copyright (C) 2014 STMicroelectronics
+ *
+ * STMicroelectronics PHY driver for STiH41x USB.
+ *
+ * Author: Maxime Coquelin <maxime.coquelin@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/clk.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+
+#define SYSCFG332 0x80
+#define SYSCFG2520 0x820
+
+/**
+ * struct stih41x_usb_cfg - SoC specific PHY register mapping
+ * @syscfg: Offset in syscfg registers bank
+ * @cfg_mask: Bits mask for PHY configuration
+ * @cfg: Static configuration value for PHY
+ * @oscok: Notify the PHY oscillator clock is ready
+ * Setting this bit enable the PHY
+ */
+struct stih41x_usb_cfg {
+ u32 syscfg;
+ u32 cfg_mask;
+ u32 cfg;
+ u32 oscok;
+};
+
+/**
+ * struct stih41x_usb_phy - Private data for the PHY
+ * @dev: device for this controller
+ * @regmap: Syscfg registers bank in which PHY is configured
+ * @cfg: SoC specific PHY register mapping
+ * @clk: Oscillator used by the PHY
+ */
+struct stih41x_usb_phy {
+ struct device *dev;
+ struct regmap *regmap;
+ const struct stih41x_usb_cfg *cfg;
+ struct clk *clk;
+};
+
+static struct stih41x_usb_cfg stih415_usb_phy_cfg = {
+ .syscfg = SYSCFG332,
+ .cfg_mask = 0x3f,
+ .cfg = 0x38,
+ .oscok = BIT(6),
+};
+
+static struct stih41x_usb_cfg stih416_usb_phy_cfg = {
+ .syscfg = SYSCFG2520,
+ .cfg_mask = 0x33f,
+ .cfg = 0x238,
+ .oscok = BIT(6),
+};
+
+static int stih41x_usb_phy_init(struct phy *phy)
+{
+ struct stih41x_usb_phy *phy_dev = phy_get_drvdata(phy);
+
+ return regmap_update_bits(phy_dev->regmap, phy_dev->cfg->syscfg,
+ phy_dev->cfg->cfg_mask, phy_dev->cfg->cfg);
+}
+
+static int stih41x_usb_phy_power_on(struct phy *phy)
+{
+ struct stih41x_usb_phy *phy_dev = phy_get_drvdata(phy);
+ int ret;
+
+ ret = clk_prepare_enable(phy_dev->clk);
+ if (ret) {
+ dev_err(phy_dev->dev, "Failed to enable osc_phy clock\n");
+ return ret;
+ }
+
+ return regmap_update_bits(phy_dev->regmap, phy_dev->cfg->syscfg,
+ phy_dev->cfg->oscok, phy_dev->cfg->oscok);
+}
+
+static int stih41x_usb_phy_power_off(struct phy *phy)
+{
+ struct stih41x_usb_phy *phy_dev = phy_get_drvdata(phy);
+ int ret;
+
+ ret = regmap_update_bits(phy_dev->regmap, phy_dev->cfg->syscfg,
+ phy_dev->cfg->oscok, 0);
+ if (ret) {
+ dev_err(phy_dev->dev, "Failed to clear oscok bit\n");
+ return ret;
+ }
+
+ clk_disable_unprepare(phy_dev->clk);
+
+ return 0;
+}
+
+static struct phy_ops stih41x_usb_phy_ops = {
+ .init = stih41x_usb_phy_init,
+ .power_on = stih41x_usb_phy_power_on,
+ .power_off = stih41x_usb_phy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static const struct of_device_id stih41x_usb_phy_of_match[];
+
+static int stih41x_usb_phy_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ const struct of_device_id *match;
+ struct stih41x_usb_phy *phy_dev;
+ struct device *dev = &pdev->dev;
+ struct phy_provider *phy_provider;
+ struct phy *phy;
+
+ phy_dev = devm_kzalloc(dev, sizeof(*phy_dev), GFP_KERNEL);
+ if (!phy_dev)
+ return -ENOMEM;
+
+ match = of_match_device(stih41x_usb_phy_of_match, &pdev->dev);
+ if (!match)
+ return -ENODEV;
+
+ phy_dev->cfg = match->data;
+
+ phy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
+ if (IS_ERR(phy_dev->regmap)) {
+ dev_err(dev, "No syscfg phandle specified\n");
+ return PTR_ERR(phy_dev->regmap);
+ }
+
+ phy_dev->clk = devm_clk_get(dev, "osc_phy");
+ if (IS_ERR(phy_dev->clk)) {
+ dev_err(dev, "osc_phy clk not found\n");
+ return PTR_ERR(phy_dev->clk);
+ }
+
+ phy = devm_phy_create(dev, NULL, &stih41x_usb_phy_ops, NULL);
+
+ if (IS_ERR(phy)) {
+ dev_err(dev, "failed to create phy\n");
+ return PTR_ERR(phy);
+ }
+
+ phy_dev->dev = dev;
+
+ phy_set_drvdata(phy, phy_dev);
+
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+ if (IS_ERR(phy_provider))
+ return PTR_ERR(phy_provider);
+
+ return 0;
+}
+
+static const struct of_device_id stih41x_usb_phy_of_match[] = {
+ { .compatible = "st,stih415-usb-phy", .data = &stih415_usb_phy_cfg },
+ { .compatible = "st,stih416-usb-phy", .data = &stih416_usb_phy_cfg },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, stih41x_usb_phy_of_match);
+
+static struct platform_driver stih41x_usb_phy_driver = {
+ .probe = stih41x_usb_phy_probe,
+ .driver = {
+ .name = "stih41x-usb-phy",
+ .of_match_table = stih41x_usb_phy_of_match,
+ }
+};
+module_platform_driver(stih41x_usb_phy_driver);
+
+MODULE_AUTHOR("Maxime Coquelin <maxime.coquelin@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics USB PHY driver for STiH41x series");
+MODULE_LICENSE("GPL v2");
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH v4 2/4] phy: phy-stih41x-usb: Add dt documentation for USB phy on STiH415/6
2014-09-08 10:32 [PATCH v4 0/4] Add usb phy support for STiH41x SoCs Peter Griffin
2014-09-08 10:33 ` [PATCH v4 1/4] phy: phy-stih41x-usb: " Peter Griffin
@ 2014-09-08 10:33 ` Peter Griffin
2014-09-08 10:33 ` [PATCH v4 3/4] MAINTAINERS: Add phy-stih41x-usb.c to ARCH/STI architecture Peter Griffin
2014-09-08 10:33 ` [PATCH v4 4/4] ARM: multi_v7_defconfig: Enable stih41x usb phy driver Peter Griffin
3 siblings, 0 replies; 5+ messages in thread
From: Peter Griffin @ 2014-09-08 10:33 UTC (permalink / raw)
To: linux-arm-kernel, linux-kernel, kishon, srinivas.kandagatla,
maxime.coquelin, patrice.chotard
Cc: peter.griffin, lee.jones, devicetree
This patch adds dt documentation bindings for the usb phy found
on STiH415/5 SoC's from STMicroelectronics, which support USB 1.1 and 2.0.
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
.../devicetree/bindings/phy/phy-stih41x-usb.txt | 24 ++++++++++++++++++++++
1 file changed, 24 insertions(+)
create mode 100644 Documentation/devicetree/bindings/phy/phy-stih41x-usb.txt
diff --git a/Documentation/devicetree/bindings/phy/phy-stih41x-usb.txt b/Documentation/devicetree/bindings/phy/phy-stih41x-usb.txt
new file mode 100644
index 0000000..00944a0
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/phy-stih41x-usb.txt
@@ -0,0 +1,24 @@
+STMicroelectronics STiH41x USB PHY binding
+------------------------------------------
+
+This file contains documentation for the usb phy found in STiH415/6 SoCs from
+STMicroelectronics.
+
+Required properties:
+- compatible : should be "st,stih416-usb-phy" or "st,stih415-usb-phy"
+- st,syscfg : should be a phandle of the syscfg node
+- clock-names : must contain "osc_phy"
+- clocks : must contain an entry for each name in clock-names.
+See: Documentation/devicetree/bindings/clock/clock-bindings.txt
+- #phy-cells : must be 0 for this phy
+See: Documentation/devicetree/bindings/phy/phy-bindings.txt
+
+Example:
+
+usb2_phy: usb2phy@0 {
+ compatible = "st,stih416-usb-phy";
+ #phy-cell = <0>;
+ st,syscfg = <&syscfg_rear>;
+ clocks = <&clk_sysin>;
+ clock-names = "osc_phy";
+};
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread